9. After binding to an antigen, T cells activate and differentiate into one of three cell types. Name each and describe briefly what they do.

1. Types of immunity, which determine the protection of the organism from living bodies and substances that bear the signs of genetic foreign information.

6. What cell secretes antibodies and explain the various functions of antibodies.?

5. Explain a function for each of the types of T cells (Tн, Тс, ТR).

1. "Which of the following statements is/are true? The only region in the body where a virus‐infected cell can interact with T cells is in the lymph nodes.Virion surface proteins tend to elicit a stronger immune response during the course of natural infection than do internal components of the virion.Epitope‐containing antigens must be digested to single amino acids and reassembled at the surface in the presence of histocompatibility antigens in order to provoke immunity. 2. Why are soluble antibodies (the products of the humoral response) good antiviral agents? 3. What are the roles of the following cells in the vertebrate immune response? B cellsHelper T cells (CD4+)Cytotoxic T cells (CD8+)"

1. Explain the difference between Innate and Adaptive Immunity?

10. Following a rattiesnake bite, a patient is injected with horse anti-rattlesnake venom serum. Ten days later, he has general weakness, headaches, muscular and joint pains, and dark urine. Laboratory studies show proteinuria. Serum concentrations of immunoglobulins are within the reference range, but serum C3 and C4 concentrations are decreased. Which of the following is the most likely pathologic process? A) Anaphylactic reaction ( Dj Delayed hypersensitivity to horse proteins (✔ Formation of antigen-antibody complexes containing horse proteins and/human immunoglobulins Formation of antigen-antibody complexes containing snake venom proteins and horse antibody Systemic reaction to snake venom Senum Sichness туре !!! Суренийнis (CL

10. What specific kinds of host cells do helper T cells respond to?

5. Results from complement activation and the functions of key components. Mechanisms. (A). Lysis - breaking holes through membrane (B). Induce inflammation (anaphylatoxin) (C). Opsonization Opsonins (D). Augment adaptive response (E). Clearance of soluble immune complexes (Ag/Ab) and apoptotic cells.

1. Under what circumstances is having a fever beneficial? Under what is having a fever circumstances harmful? 2. What are the actions of T cells? What are the actions of B cells?